Despite the evidence pointing to its detrimental child outcomes, physical punishment remains one of the most commonly used techniques to discipline children in many Nigerian homes. Research has revealed that a majority of Nigerian parents are not aware of the negative consequences. They are also not aware of nonaversive ways to discipline children. Unfortunately, there appears to be a paucity of programs to enlighten parents in this regard. This study set out to design, implement, and evaluate the effectiveness of a parent education program (PEP) in relation to parental reported use of physical punishment. The quasi-experimental pretest and posttest control group design was adopted. Participants comprised 86 parents of young children, recruited while in attendance at a parent-teacher association (PTA) meeting. Forty-three participants were assigned to each of the experimental and control groups, with the experimental group exposed to a 2hr PEP intervention session. The control group received placebo treatment. A questionnaire was used to collect data before and 4 weeks after intervention. Results showed that the mean posttest score difference between the two groups was statistically significant: t(84) = 8.57, p < 0.05. The main effect of treatment was also statistically significant F(1,73) = 11.482, p < 0.05, partial ?[superscript 2] = 0.140. Findings suggest that PEP intervention was associated with reduction in parental reports of use of physical punishment in child training.